Relay.



I F. 8. BOOK RELAY.

APPLICATION FILED DEC. 14, 1914.

1,1 85,369. Patented May 30, 1916.

2 SHEETS-SHEET 1,

F. B. COOK.

RELAY.

APPLICATION FILED DEC. 14, I914.

Patented May 30,1916.

illi? uuumln Hmnnlll 'rm: COLUMBIA PLAIjOORAPH co., wnmNu'roN. D. c.

UNITED STATES PATENT OFFICE.

FRANK B. COOK, OF CHICAGO, ILLINOIS, ASSIGNOR TO FRANK B. COOK COMPANY,OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

RELAY.

Specification of Letters Patent. -Patented pl 30 1916 Application filedDecember 14, 1914. Serial No. 877,123.

0 all '10 ham it may concern Be it known that I, FRANK B. (3001;, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and usefulImprovement in Relays, of which the following is a full, clear, concise,and exact description, reference being had to the accompanying drawings,forming a part of this specification.

My invention relates to electrical equipment employing coils of wire andhas a number of objects and advantages in view.

My invention, in one of its aspects, relates to relays which areemployed for controlling electrical circuits, the object of this featureof my invention being to improve relay efiiciency by requiring a minimummovement of a relay armature across a minimum air gap to effect therequired movement of a circuit controlling switch. I accomplish thisobject of my invention by so interrelating the armature with the twocomplemental contacts of the switch that belong to the same circuit thatsuch contacts may both be moved by the armature in opposing directions.In the case of a normally open circuit the armature would move both ofthese contacts mutually toward each other to close the circuit and inthe case of a normally closed circuit the armature would. move both ofthese contacts mutually away from each other to open the circuit.

By means of my invention I am enabled to operate two groups of contactsprings, in which contacts of each group are individual to contacts ofthe other, it being possible simultaneously to effect circuit changes ina plurality of circuits with the same minimum movement of the armaturethrough a minimum air gap, this movement not needing to be larger thanthat which would obtain if but two contacts were controlled by the samearmature.

The invention has for another of its objects the provision of animproved arrangement of insulation for defining the winding space forthe helix of an electromagnet or other circuit coil,'for maintaining afixed relationship of this winding space with the core of the magnet,and for preventing access of the magnet winding to the magnet core.lVhere the magnet includes an armature movable toward and from an end ofthe core the adjacent portion of the insulation that defines the windingspace is caused to carry a non-magnetic stop that serves to limit theextent to which the armature mav move toward the core so as to keep thearmature out of direct contact with the core to prevent it from stickingthereto. This stop is preferably formed of the same insulating substancefrom which the structure which defines the winding space is formed.

My invention has for another of its ob jects the provision of improvedmeans for mounting electrical windings, and the provision of'improvedwinding terminals and circuit terminals in conjunction with theelectrical winding and the mounting therefor.

The invention in all of its aspects will be more fully explained byreference to the accompanying drawings showing the preferred embodimentthereof and in which Figure 1 is a view in sectional elevation of arelay constructed and mounted in accordance with my invention; Fig. 2 isa plan view of the structure illustrated in Fig. 1; Fig. 3 is a frontelevation of the structure with a part broken away more clearly toreveal. a feature of construction; Fig. 4: is a sectional view on line44: of Fig. 1; Figs. 5 and 6 are perspective views illustrating detailsof the relay proper; Fig. 7 is a perspective view illustrating a mounting for the relay proper; Fig. 8 is a perspective view illustrating thepreferred form of relay armature; Fig. 9 is a side elevation, partiallybroken away, of a part of the structure; Fig. 10 is a front view of therear portion of the relay mounting illustrated. in Fig. 7 Fig. 11 is afront view of the preferred form of circuit terminal; and Fig. 12 is asectional view on line 1212 of Fig. 11.

Like parts are indicated by similar characters of reference throughoutthe different figures.

The magnetic core 1, if not naturally sufficiently irregular toaccomplish one of the objects of my invention, may be provided withirregularities such as the depressions illustrated at 2. Some of thesedepressions are desirably so located as to lie in the planes of thespool heads whose central openings receive the ends of the core. Thecore 1 is disposed within a space in a molding machine that conforms tothe shape and sit re oi the spool heads and to a sleeve 1 which is tosurround the core, the core being coaxial with the sleeve 1. After thecore is thus located within the molding machine molding composition isforced into the space that is not occupied by the core whereby the spoolheads 8 and the insulating sleeve at are formed integrally. The core 1is also desirably so located within the molding machine that a slightclearance exists at its forward end whereby a spacer of insulatingmaterial 5 is integrally formed with the elements 3 and -l-, this spacerbeing desirably in the form of a cap which covers the central opening inthe spool head and the portion of the core 1 that projects beyond theforward spool head 3.

By means oi the structural characteristics so far specificallydescribed, the core 1 is maintained in fixed relation with the spoolheads 3 and the sleeve 1 whereby a definite winding space for the magnetwinding 6 is assured, and whereby access of any iortion of the windingdirectly to the core 1 is absolutely prevented since no cracks orinterstices exist between the insulating sleeve and the spool headsintegrally formed therewith. The spacer 5 is not only carried directlyby the forward spool head 3, which I believe is novel with me but isalso in tegrally -formed therewith whereby the relationship of thisspacer with the core 1 and the relay armature T is definitely maintainedparticularly when this spool head is brought into fixed relation withthe core.

The yoke S of magnetic material is angular in shape, the shorter andupright leg of the yoke having an opening therein which receives thethreaded reduced end 9 of the core, the yoke being clamped intoengagement with the core by means of a nut 10. The longer side of theyoke desirably projects forwardly beyond the structure to constitute anarmature mounting being there formed with an oblong opening 11 whichreceives the angular tongue 12 of the armature 7. The opening 11 is notmuch wider than the thickness of the tongue, a formation which may beadopted because of the presence of a transverse groove 13 in the lowerportion of the armature spaced apart from the horizontal branch of thetongue 12 about the thickness of the yoke to permit the groove to lie atthe upper surface of the yoke 8 to enable said groove 13 to permit ofarticulation of the armature tongue with the yoke 8. The horizontalforwardly extending branch of the tongue 12 underlies the forwardportion of the yoke 8 so that the armature cannot be removed until it isswung to the right nearly to parallelism with the adjacent side of theyoke S. The upper end of the armature carries two vertically disposedpreferably metallic cam rollers 11, 1.5 which engage cams 16 17,preferably of insulating material, which are respectively mechanicallyconnected with a set of Contact springs 18 and set 0f contact springs19, each contact spring 18 coopcrating with a contact spring 19 in thecontrol of a circuit. ills illustrated the contacts 18 are normally outof contact with their complemental contacts 19 in which case circuitchanges are effected by bringing the contacts 18 and their complementalcontacts 19 together, though the invention is not to be limited to thenormally separated relation of the contacts 18 from their complementalcontacts 19. The cams 16 and 17 have enlarged base portions. The springs18 and 19 are desirably respectively provided with lugs 20 and 21 attheir unmounted ends which pass through correspondinglyshaped openingsin the bases of the cams 1G and 17 whereby the bases of the cams 16 and17 constitute couplers to couple the unmounted ends of the springs towhich they pertain so that the movement of the cam 16 will cause thesimultaneous movement of the springs 18 coupled therewith and movementoi. the cam 17 will cause simultaneous movement of the springs 19coupled therewith. The mechanical union of the cams 1G and 17 with thesprings 18 and 19 to which they pertain maintained by the spring clips22, respectively integrally formed with the springs18 and 19 but twistedto occupy planes transverse to the planes of said springs so as to haveflat engagement with the bases of the cams where these cams receive thelugs 20 and 21. The engaging faces of the cams 16 and 17 oppose eachother and are spaced apart. That these cams are symmetrically arrangedwith spacing therebetween for receiving the cam rollers 15: and 15whereby the cams will be forced apart upon each attraction of thearmature 7 toward the core 1. In this way the armature T is caused tooperate both sets of springs 18 and 19 whereby each spring 18, 19 ismoved toward its complement 19 18. Hitherto it was the practice to causethe armature positively to move one spring toward its complement and tocause movement of such complement merely as a result of the movement ofthe first spring. By means of the construction of my invention any twosprings that are complemental to each other are moved by the armatureindependently of each other in opposite directions. In the embodiment ofthe invention illustrated the armature causes the movement of twocomplemental springs toward each other in opposing directions, to bringthe springs into contact, though obviously such movement by the armatureupon two complemental springs would be reversed to spread the springsapart if such springs are normally in contact. When the relay isdeenergized the resilience of the springs will force the same to normalposition and in moving to such normal position they will move the cams16 and 17 to their normal position whereby the armature will be givenits idle location. It will be seen that the swinging movement of thearmature for a given relative movement of any two complemental contacts18, 19 is less than would be required were these two contacts not movedin opposite directions independently of each other by the armature. Theair gap that exists between the relay core and the armature may,therefore, be materially reduced thereby greatly increasing theefficiency of the relay when it is employed to cause the mutual.approach or mutual separation if the springs are normally in contact) ofany two springs 18, 19 that enter into the control of the same circuit,one form of circuit being illustrated in Fig. 2 where adjacent springs18 and 19 constitute the normally separated terminals of a circuitincluding a signaling lamp 24 and a battery 25, the lamp being caused toglow each time the terminals 18 and 19 of its circuit are causedmutually to approach upon the attraction of the armature. It is notnecessary to illustrate circuits that are controlled by each of theother five pairs of cooperating contacts 18, 19.

The springs 18 and 19 are insulated from each other and are clamped tothe upwardly extending insulating lug 26 by means of screws 27 that passfreely through the clamping plate 28 and are in threaded engagement withthe clamping plate 29. The lug 26 is integrally formed with a mounting30 that extends longitudinally of and overlies the relay winding, thenether surface of the mounting 30 being concave to conform in shape tothe winding. The forward end of the mounting 3O nearly reaches theforward spool head 3 and is maintained in assembly therewith by means ofbinding screws 31, these binding screws also operating to maintain thewinding strip metal terminals 32 in engagement with circuit terminals 33that project slightly forwardly of the mounting 30 to enable the screws31 to bring the winding terminals and circuit terminals into firmengagement (as will be seen by inspecting Fig. 9) without interferencedue to direct engagement between the forward spool head and front end ofthe mounting 30. The winding terminals are preferably of the formillustrated most clearly in Figs. 9, l1 and 12 which illustrate aterminal formed of strip metal stamped into the shape illustrated, aportion being in the form of a flanged tube 34 whose flange engages theforward end of the rod 33 while another part of the terminal is in theform of a cup 35 that is initially filled with solder and thereafterbored out to receive an end of the magnet winding, the drill leavingsuflicient of the solder to permit of the ready union of the windingterminal and winding end. The terminals 32 may each be provided with asupplemental tab 36 for union with a winding end in case it is notdesired to attach such winding end to the cup 35. The terminals 32 aremolded within the forward spool head 3 in order to secure a definitelocation thereof. The circuit terminals 33 are likewise molded in thebody of insulating material 30 and project to the rear of this body inorder that they may be passed through the mounting plate 37 whereconnection may be made with the circuit. The vertical branch 38 of themounting 30 is provided with rearwardly extending cylindricalcontinuations 39 that pass through suitable openings in the mountingplate 37. The lower cylindrical continuations 39 are hollow to permit ofthe passage therethrough of winding terminals 40 which may be employedif the winding is to be connected in circuit thereat instead of at theterminals 32 or which may be of service in conjunction with theterminals 32 if the relay winding is subdivided into two coils. Thevertical branch of the angular mounting 30 is provided with a verticalgroove 41 through which there is a circular hole 42 in which the nut 10may snugly turn. The groove 41 conforms in shape to the vertical branchof the yoke 8, this yoke branch and the nut 10 cooperating respectivelywith the groove 41 and the hole 42 to position the rear end of themagnet winding with respect to the mounting 30, the forward end of themagnet winding being positioned with respect to the forward end of themounting 30 by the screws 31. The single screw 43 is passed through themounting plate 37 into the mounting 30 to hold the mounting 30 andmounting plate 37 together, the cylindrical portions 39 serving toprevent rotation of the magnet structure upon the plate 37.

The metallic mounting plate 37 is formed with holes not only forreceiving the extensions 39 and the shank of the screw 43 but also forreceiving the terminal ends of the springs 18 and 19. Each hole in themetallic mounting plate 37 is lined with insulation (44) so as to avoidelectrical connection between the same and the metallic parts passingtherethrough. of the mounting plate are also faced with insulation. Inthus insulating the mounting plate it is placed in a molding machinethat has suitable spacing for the flow of insulating fluid which iscaused to surround all portions of the niounting'plate and to line Allother surfaces 1 all holes therein so that no metal of the mountingplate is exposed.

lVhile I have herein shown and particularly described the preferredembodiment of my invention I do not wish to be limited to the precisedetails of construction shown as changes may readily be made withoutdeparting from the spirit of my invention, but

Havin thus described my invention I claim as new and desire to secure byLetters Patent the following 1. in electro-magnet including its armatureand a mounting for the armature, said armature mounting having anarmature re ceiving opening while the armature has a tongue providedwith an angular extension, the body of the tongue being received in saidopening while the angular extension of said tongue underlies themounting, the armature being provided with a groove therein adjacent theupper surface of the armature mounting for purpose of assembly.

An electro-magnet including its armature and a mounting for thearmature, said armature mounting having an armature receiving openingwhile the armature has a ton ue provided with a forwardly projectingangular extension, the body of the tongue being received in said openingwhile the angular extension of said tongue underlies the mounting, thearmature being pro vided with a groove therein adjacent the uppersurface of the armature mounting for purpose of assembly.

3. A relay including the armature there of; a contact which is to bemoved by the armature; and an element interposed between the armatureand the contact to transmit motion from the armature to the contact,said element having spaced apart portions between which an engagingportion of the armature structure is received and with respect to whichsuch armature portion may have lost motion. one of these formedtherewith; and means for actuating the contact spring maintained inengagement therewith by said clip.

A switch structure including a contact spring having a spring clipintegrally formed therewith; a lug carried by the spring contact; and acontact actuator en gaged by said lug, the spring clip operating tomaintain the engagement between the contact actuator and the lug.

6. The combination with a winding; of a spool therefor; a windingterminal carried by a head of the spool; a mounting for the winding; acircuit terminal carried by the winding mounting; and meansformaintaining these terminals in engagement.

7. The combination with a winding; of a spool therefor; a windingterminal carried by a head of the spool; amounting for the windinghaving a portion extending longitudinally of the winding; a circuitterminal extending longitudinally of and carried by said portion; and ascrew for maintaining said spool head and mounting in assembly andoperating to maintain the said termi nals in engagement.

8. The combination with a winding; of a core therefor; a yoke; means forassembling the yoke and core which includes a nut; a mounting for thewinding including a portion 38 having a groove l1 corresponding in shapeto the adjacent portion of the yoke and a hole {2 within which the nutis snugly received; and means for holding the winding structure andmounting together.

9. The combination with a winding; of a core therefor; a yoke; means forassembling the yoke and core which includes a nut; a mounting for thewinding including angular-1y related portions one of which is providedwith a groove 41 corresponding in shape to the adjacent portion of theyoke and a hole 42 within which the nut is snugly received; a head atthe other end of the core opposite the nut for taking part in definingthe winding space; and a screw for holding the head and the adjacent endof the winding mounting in assembly.

10. The combination with a winding; of a core therefor; a yoke; meansfor assembling the yoke and core; a mounting for the winding including aportion 38 having a groove i1 corresponding in shape to the adjacentportion of the yoke; and means for holding the winding structure andmounting together.

11. The combination with a winding; of a core therefor; a. yoke; meansfor assembling the yoke and core: a mounting for the winding includingangularly related portions one of which is provided with a groove 41corresponding in shape to the adjacent portion of the yoke; a head atthe other end of the core opposite the nut for taking part in definingthe winding space; and a screw for holding the head and the adjacent endof the winding mounting in assembly.

12. The combination with a winding: of a mounting therefor. the adjacentportions of the winding structure and winding mounting having formationstaking part in effecting their relative disposition: and means forholding the winding structure and mounting together.

13. The combination with a winding: of a mounting therefor includingangularly related portions, the winding structure and one of saidportions having interengaging In Witness whereof, I hereunto subscribeformations taking part in effecting their my name this first day ofDecember, A. D. relative disposition; a head at the other 1914;.

end of the mounting taking part in definrrtANK B. COOK. ing the Windingspace; and a screw for hold- Witnesses:

ing the head and the other angular portion ETTA L. WHITE,

of the winding mounting in assembly. G. L. GROGG.

Copies of this patent my be obtained !or five centl each, by addressingthe "Commissioner of Patents, wuhlnflon, D. G."

